Article
Multidisciplinary Sciences
Miyabi Imai-Imada, Hiroshi Imada, Kuniyuki Miwa, Yusuke Tanaka, Kensuke Kimura, Inhae Zoh, Rafael B. Jaculbia, Hiroko Yoshino, Atsuya Muranaka, Masanobu Uchiyama, Yousoo Kim
Summary: This study combines a scanning tunnelling microscope (STM) with localized plasmon fields driven by a tunable laser to directly visualize the photocurrent channels through the molecular orbitals of a single molecule at atomic-scale resolution. The direction and spatial distribution of the photocurrent were found to be sensitive to the bias voltage, and counter-flowing photocurrent channels were detected even at a voltage where the averaged photocurrent is close to zero. The competition between photoinduced electron transfer (PET) and photoluminescence was also observed, and the relaxation pathway of the excited molecule could be controlled by positioning the STM tip with three-dimensional, atomic precision.
Article
Chemistry, Multidisciplinary
Siyu Chen, Wenlu Shi, W. Ho
Summary: We demonstrate rectification spectroscopy (RS) for single molecules using continuous-wave terahertz (CW THz) radiation at the tunneling junction of a scanning tunneling microscope (STM) at 8 K. CW THz-RS offers a new technique for studying single-molecule vibrational and magnetic excitation spectroscopy, alongside inelastic electron tunneling spectroscopy (IETS). By comparing IETS and THz RS, we find that CW THz induces a sinusoidal bias modulation with an amplitude that is linearly dependent on the THz far-field amplitude. This THz-induced bias modulation amplitude appears to be sensitive to the alignment of the THz beam but insensitive to changes in the tunneling gap smaller than the THz wavelength.
Article
Chemistry, Multidisciplinary
Shaoqing Du, Yoshifumi Hashikawa, Haruka Ito, Katsushi Hashimoto, Yasujiro Murata, Yoshiro Hirayama, Kazuhiko Hirakawa
Summary: In this study, electron transport through H2O@C-60 single molecule transistors (SMTs) was investigated, revealing the presence of multiple tunneling-induced excited states below 30 meV. Terahertz (THz) photocurrent spectroscopy on H2O@C-60 SMTs confirmed the same excitations, with quantum rotational excitations of the water molecule observed below 10 meV. The simultaneous observation of quantum rotational excitations of both para- and ortho-water molecule for a single water molecule suggests a rapid fluctuation between the two states due to interaction with conducting electrons.
Article
Chemistry, Multidisciplinary
Matthias Tombers, Jennifer Meyer, Jonathan Meyer, Arkadiusz Lawicki, Vicente Zamudio-Bayer, Konstantin Hirsch, J. Tobias Lau, Bernd von Issendorff, Akira Terasaki, Thomas A. Schlathoelter, Ronnie A. Hoekstra, Sebastian Schmidt, Annie K. Powell, Eva Kessler, Marc H. Prosenc, Christoph van Wuellen, Gereon Niedner-Schatteburg
Summary: In this study, the magnetic properties of isolated cationic species [Mn12O12(CH3COO)(15)(CH3CN)](+) were investigated using gas phase X-ray Magnetic Circular Dichroism spectroscopy, and found to resemble closely to that of the corresponding bulk samples. Additionally, broken symmetry DFT calculations revealed that the Mn-4(IV) core exhibits almost no magnetic anisotropy, while the surrounding Mn-8(III) ring is highly anisotropic. These intrinsic magnetic properties are largely unaffected by environmental factors, suggesting robustness in the Mn-12 core scaffold within these complexes.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yang An, Xiangqian Tang, Wenyu Wang, Dong Hao, Xinjia Zhao, Muyu Wang, Xia Ye, Xinyan Shan, Xinghua Lu
Summary: This article discusses the debromination of a single DBA molecule on a surface using voltage pulses from a scanning tunneling microscope tip. The study reveals the nature of the single-electron process, the effects of pulse magnitude and tip location on debromination yield, and the different dynamics of dissociation for the two C-Br bonds. The research provides guidance for automated atomic engineering and fabrication of artificial nanostructures in the future.
Article
Chemistry, Multidisciplinary
Anna Kuzmina, Markus Parzefall, Patrick Back, Takashi Taniguchi, Kenji Watanabe, Achint Jain, Lukas Novotny
Summary: By controlled stacking of graphene layers, the limitation of single-layer graphene as a material for light-emitting devices has been overcome, enabling twist-controlled resonant light emission. Experimental findings show light emission irrespective of the crystallographic alignment between the graphene electrodes, with a spectrally tunable resonant peak in the near-infrared range.
Article
Nanoscience & Nanotechnology
Paulo Jarschel, Jin Ho Kim, Louis Biadala, Maxime Berthe, Yannick Lambert, Richard M. Osgood, Gilles Patriarche, Bruno Grandidier, Jimmy Xu
Summary: This study explores the potential application of single-electron tunneling (SET) in PbS nanoplatelets for neuromorphic computing, providing new insights for the development of neuromorphic computing through modeling synaptic operations.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Condensed Matter
Simon Divilov, Wen Wan, Paul Dreher, Emre Bolen, Daniel Sanchez-Portal, Miguel M. Ugeda, Felix Yndurain
Summary: Using spin-resolved density functional theory calculations, the study reveals that the most stable ground state of single-layer NbSe2 is ferrimagnetic, which prevents the development of charge density wave order. The calculated density of states accurately reproduces the experimental electronic and magnetic structure, highlighting the importance of magnetism in understanding the formation mechanisms of 2D superconductivity and CDW order.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Multidisciplinary Sciences
Linan Meng, Na Xin, Chen Hu, Hassan Al Sabea, Miao Zhang, Hongyu Jiang, Yiru Ji, Chuancheng Jia, Zhuang Yan, Qinghua Zhang, Lin Gu, Xiaoyan He, Pramila Selvanathan, Lucie Norel, Stephane Rigaut, Hong Guo, Sheng Meng, Xuefeng Guo
Summary: The study presents a robust solid-state single-molecule field-effect transistor using graphene electrodes and a metal back-gate electrode. The transistor exhibits high on/off ratio and reversible photoswitching function, making it a potential alternative to conventional silicon-based transistors.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yu Wang, Qian Gao, Wenhui Li, Peng Cheng, Yi-Qi Zhang, Baojie Feng, Zhenpeng Hu, Kehui Wu, Lan Chen
Summary: This study successfully realized ideal two-dimensional electron gas (2DEG) with multiple quantized states in few-layer InSe films, which provides possibilities for constructing high-performance electronic devices using two-dimensional van der Waals materials.
Article
Chemistry, Multidisciplinary
Reza J. Kashtiban, Maria G. Burdanova, Andrij Vasylenko, Jamie Wynn, Paulo V. C. Medeiros, Quentin Ramasse, Andrew J. Morris, David Quigley, James Lloyd-Hughes, Jeremy Sloan
Summary: The formation of one-dimensional CsI chains and helical chains within carbon nanotubes of different diameters has been demonstrated, showing varying effects on the encapsulating tubes' structure and electronic properties. Analysis using density-functional theory and Bader analysis was conducted to understand the observed changes.
Article
Physics, Applied
Taruna Teja Jupalli, Ananta Debnath, Gaurang Prabhudesai, Kensuke Yamaguchi, P. Jeevan Kumar, Yukinori Ono, Daniel Moraru
Summary: In this study, a comparative analysis was conducted on nano-scale silicon-on-insulator transistors with phosphorus-doped channels under two different doping concentrations. It was found that devices with higher dopant concentrations can achieve single-electron tunneling operation at room temperature, while devices with lower concentrations are limited to around 100K. Numerical simulations showed that donor clustering plays a dominant role in the formation of quantum dots, with clusters consisting of more than three donors responsible for room-temperature operation.
APPLIED PHYSICS EXPRESS
(2022)
Article
Chemistry, Physical
Diptarka Hait, Yu Hsuan Liang, Martin Head-Gordon
Summary: This study explores the prediction of molecular multipole moments and the assessment of performance in describing molecular interactions with external electric fields within density functional theory. The use of translationally invariant second cumulants matrix shows better performance, while some modern functionals may exhibit disappointing results.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Energy & Fuels
Bat-El Cohen, Ron Alafi, Jonathan Beinglass, Adva Shpatz Dayan, Oren Goldberg, Shachar Gold, Isaac Balberg, Leeor Kronik, Lioz Etgar, Oded Millo, Doron Azulay
Summary: This study investigates the effect of in-gap states on recombination rates in quasi-2D lead-iodide-based perovskites intercalated with various spacer molecules using scanning tunneling spectroscopy, temperature-dependent photoconductivity measurements, and theoretical calculations. Shallow in-gap states are found to dominate the recombination kinetics of photogenerated carriers in these systems.
Review
Chemistry, Physical
Saikat Dutta, Rahul Patil, Tapan Dey
Summary: Single enzyme fuel cells have the unique capability of degrading organics and generating electricity. Factors such as bioelectrode fabrication, enzyme conformation, and electron transport mechanism significantly influence the power density. These fuel cells have advanced applications in areas such as waste-water treatment, energy storage, and self-powering biosensors.
Article
Nanoscience & Nanotechnology
Yuya Kitaguchi, Satoru Habuka, Hiroshi Okuyama, Shinichiro Hatta, Tetsuya Aruga, Thomas Frederiksen, Magnus Paulsson, Hiromu Ueba
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2015)
Article
Multidisciplinary Sciences
Y. Kitaguchi, S. Habuka, H. Okuyama, S. Hatta, T. Aruga, T. Frederiksen, M. Paulsson, H. Ueba
SCIENTIFIC REPORTS
(2015)
Article
Physics, Condensed Matter
Alexander Gustafsson, Magnus Paulsson
JOURNAL OF PHYSICS-CONDENSED MATTER
(2017)
Article
Multidisciplinary Sciences
Norio Okabayashi, Angelo Peronio, Magnus Paulsson, Toyoko Arai, Franz J. Giessibl
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2018)
Article
Chemistry, Multidisciplinary
Norio Okabayashi, Magnus Paulsson, Hiromu Ueba, Youhei Konda, Tadahiro Komeda
Article
Materials Science, Multidisciplinary
Yasuhiro Ootsuka, Thomas Frederiksen, Hiromu Ueba, Magnus Paulsson
Article
Materials Science, Multidisciplinary
H. Okuyama, A. Shiotari, T. Kumagai, S. Hatta, T. Aruga, Y. Ootsuka, M. Paulsson, H. Ueba
Article
Materials Science, Multidisciplinary
T. Frederiksen, M. Paulsson, H. Ueba
Article
Materials Science, Multidisciplinary
Alexander Gustafsson, Hiromu Ueba, Magnus Paulsson
Article
Materials Science, Multidisciplinary
Yulia E. Shchadilova, Sergei G. Tikhodeev, Magnus Paulsson, Hiromu Ueba
Article
Physics, Multidisciplinary
Yulia E. Shchadilova, Sergei G. Tikhodeev, Magnus Paulsson, Hiromu Ueba
PHYSICAL REVIEW LETTERS
(2013)
Review
Chemistry, Physical
Norio Okabayashi, Magnus Paulsson, Tadahiro Komeda
PROGRESS IN SURFACE SCIENCE
(2013)
Article
Materials Science, Multidisciplinary
Alexander Gustafsson, Norio Okabayashi, Angelo Peronio, Franz J. Giessibl, Magnus Paulsson
Article
Materials Science, Multidisciplinary
Norio Okabayashi, Alexander Gustafsson, Angelo Peronio, Magnus Paulsson, Toyoko Arai, Franz J. Giessibl
Article
Materials Science, Multidisciplinary
Alexander Gustafsson, Magnus Paulsson